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Finding the Fourth Proportional to 319.01, 477.85 and 164.47

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Solution

The fourth proportional to 319.01, 477.85 and 164.47 is: 246.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.01 : 477.85 = 164.47 : x
  2. Step 2: Convert to fraction form
    319.01/477.85 = 164.47/x
  3. Step 3: Cross multiply
    319.01x = 477.85 × 164.47
  4. Step 4: Simplify right side
    319.01x = 78,591.99
  5. Step 5: Solve for x
    x = 78,591.99/319.01
  6. Step 6: Final answer
    x = 246.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.